Drop hammer



Jan. 99 l923 I liiL'L, H. TERHUNE.

DROP HAMMER.

man JULY 22,1921. zsHETssHEr l.

MNIMA l M/d/d/me Jan., 9, 1923. 1,141,716. H. TERHUNE.

DROP HAMMER.

FILED JULY 22,1921. 7 sHEEs-SHEU 2.

Jan. 9, 1923.

H. TERHUNE.

DROP HAMMER.

FILED JULY 22,1921. zsHEns-SHEET 3.

Jan. 9, 1923. LMLTIM.

, H. TERHUNE.

DROP HAMMER.

FILED JULY 22,1921. sHEErs-SHEET s.

Jan. 9, 1923.

H. TERHUNE. v

DROP HAMMER.

fl-LED JULY 22, |921.

ISHEETS-SHEET 6.

M EA Jan., 9, 1923. 1,441,716.

H. TERHUNE.

DROP HAMMER.

FILED IULY 22. |92!- ISHEETS-SHEET I.

Patented Jafa, 1923.

HOWARD TERHUNE, 0F MASSILLON, CHIO.

naar HAMMER.

Application led July 22, 1921. Serial ,.No. 486,7927.

To all 'whom it may concer/rt:

Be it known that I, HOWARD TERHUNE, a citizen of the United States, residing at Massillon, in the county of Stark and State of Ohio, have invented new and useful lm-y an upright frame' member necessarily in clines the same and requires frequent replaning of the upright guides; to avoid which the present improvement involves means for adjusting the upper ends as well as the 'lower ends of the' upright members, and also includes improved means for adjusting the uprights upon the base or anvil member, to prevent a twisting or turning of the upright thereon.

A rigid clamping of the friction roll releasing lever to the frame of the machine and to the friction bar, requires'a tighter adjustment than normally necessary of the friction rolls, to properly respond to the varying shocks of work, and the usual connections of this lever tends to turn its bracket on the frictiorvbar; to avoid which the present invention involves the use of yielding means for mounting the releasinglever, with a limiting stop for the same, and a slidingV guide to prevent a turning of the lever bracket on thefriction bar.

A knock-off lever secured tol the friction bar also tends to turn the bar; to avoid which the present improvement .'involves'a sliding knockoff lever carried by'links swinging on a bracket adjustably secured to an upright member of the frame. e

Preferred forms of the several improve- -ments .embodied ina board drop hammer, are illustrated inthe accompanying drawin', forming part hereof, in whichure 1 is a frontelevation of the entire mg. l

` The foot-of each upright member is formed machine;

Fig. 2, a right side elevation ofthe same; Fig. 3,' a le t same on the median line IIIe-111;

the hammer in different kinds of.

view elevation section of the` Fig. 4, a fragmentary front view elevation section on line 1V--IV, Figs. 2 and 3.

F ig. 5, a fragmentary plan section on line V-V, 4; v

Fig. 6, an inner end view of the upright frame adjusting head;

Fig. 7, a fragmentary front elevation section of the frame base, and left-upright aS on line VIIe-VII, Figs. 2 and 3; l

Fig. 8, a plan section of the left upright and base on line VIII-VIII, Fig. 7

Fig. 9, a detached perspective view of one adjusting leg;

Fig. 10, a detached perspectivey view of one wearlng plate;

Fig. 11, a, fragmentary front elevation, partly in section of the releasing lever, the section being on line XI-XI, Fig. 1-3;

' Fig. 12, a right view section of the releasing lever mechanism online XII-XII, Fig. 11; d

Fig. 13, a plan section of the releasing lever mechanism on line XIII-XIII, Fig. ll; 1` Fig. 14, a reduced vright side elevation of the releasing lever bracket showing the lever in section;

Fig. 15, a plan view of the knock-out mechanism showing the frame uprightv in section on line XV-XV, Fig. .1;

Fig. 16, a frontl elevation section of the knock-olf mechanismv on line XVI-XVI, Fig. 15;

Similar numerals refer to similar parts throughout the drawings.

4Upon the base or anvil 1 of the machine, are mounted the upright-members 2 and 2',

upon which is secured the housing 3, in'

which are mounted the bearings 4 carrying the shafts-5 vfor the friction rolls 6 in well known manner.

On each side of the base or anvil 1 is provided a bearing' for the respective upright members 2 and 2 of the frame, each bearing having an inner portion 7 in a lower plane and an upper portion 7 in an upper plane, and a wedge shoulder 8 at the junction of the inner and outerportions of the bearwith an inner bearin portion 9 in a lower plane and V an outer earing portion 9' in an upper plane adapted t0 rest and slide the base.

One of the wedge shoulders, preferably Athe baseshoulder, is located atan endwise 1 angle from the normal plane of the other shoulder, thereby forming a tapered channel between the shoulders in which is entered a tapered wedge 11 having its thinner end directed rearward in one side and for- `ward in the other side, by which the uprights may be adjusted upon the base of the frame, the wedge. being moved and held endwiseby vthe screwstem 12 secured to the frame and the lock nuts 13 thereon.

Transverse guide channels 15 and V15. are provided in the vrespective bearings of the base, preferably in the median line thereof, and corresponding transverse guide tongues 16 and 16 depend from the foot bearing portions -of the uprights.l The guide tongues are fitted to the channels so as to guide the lateral adjusting movements of the upright on the base and hold the V-guide's 17 on their inner sides in true alinement with each other. The location of the wedgeshoulder 8 in each .side of the base, intermediate therespective bearing portions thereof, and the location of transverse guide grooves outside, as well as inside, of the adjusting wedge and co-operating shoulders, serves to positively hold the rights in true position on the base and;` revent any turning or twisting 'thereof dn-ring an adjustment of'Y the uprights or'the operation of the machine.

For adjusting the uprights upon the base, the clamping bolts 18 and 18 are loosened and one of the uprights, preferably on the right side of the machine as illustrated, is 'properly adjusted by the corresponding wedge; after which the other side is'adj usted inward by the corresponding wedge, and the clamping bolts are then tightened Ato* hold theuprights'in their adjusted position.

The housing 3 is secured on the upper ends of the uprights`2'and 2.v by a pair of clamping bolts 19 one in front and one in rear, extending transversely through the upper ends of the uprights. The bottom 2O ofthe housn ing' bears at;l each side upon the seatsl 21 formed on the tops of the uprights, inside of which a flange 22 depends from the housing *on which are -formed hubs 23 and 23 t irough which the bolts 19 are passed. The hub 23 on one is normallvin abutment with the inner face of the corresponding upright. An adjusting screw'slee've 24 is provided on each rod 19 in a screw socket 25 formed j in the other upright; and upon the inner end Tashers 28 are preferably provided on each end of the bolt 19 for bearing squarely against the outer sides of the uprights; outside of .which .washers are located the spiral springs 29 against' which nuts 30 are screwed upon the ends of the bolts, for clamping and securing the parts in position. u

By thisconstruction and arrangement, 1t is evident that the uprights may be adjusted to and from each other'by an adjustment of the screw sleeve 24 in the one upright; the same being done by the first releasing of nuts 30, on'the bolts 19 and sliding the upright 2 outward to disengage tlie adjusting head lugs 27 from lthe hub channels 28; after which the screw sleeve is turned sufliciently to give the desired adjustment, and the shifted upright is moved back into position,-

and the parts clamped 'together by the nuts 30.

` By thus adjusting the upper ends, as well well as the lower ends of the uprights, it is evident that they may always be maintained with their V-guides 17 in true parallel relation, thereby avoiding'the necessity of a frequent planing of the guides to keep them true to each other.

The hammer head 31 operates between the guides 17 and is normally sustained in upper position by means of the board 32 and the clamping jaws 33 vmounted in the housing, one jaw being-locked in clamping position by a clamp rod 34, and the other jaw being released from and returned to clamping position by the clamp rod 34', the-rock lever 35, connecting bar 36' and the pedal 37 in well known manner.

The hammer head is raised to upper position by means' of the friction rolls 6 eccentrically mounted in the head, one roll being located in contacting position by a friction bar 38 and the other roll being released from and engaged with the board by a friction bar 38'; the foot 39 of the latter bar normally resting in releasing relation upon a step 40, secured to the base in well known manner.

The improved roll releasing lever mechanism includes a bracket 41 secured at its forward end by the 'clamping aars 42 and the bolts 43 to the friction rod 38', and having a-runner 44 on the outer side of its rear end in sliding lcontact with the inner side of the abutment block 45 adjustably secured by a bolt 45 to the face of the upright 2.

The releasing lever 46 extends through the bracket'41 and is horizontally pivoted on the pin 47 secured in the bracket. The" free end of the lever extends inward in Trout-of the hammer, and in the path o `the ,hammer pin 48, by means of which i" is actuated when the hammer rises to upper position.

' The outer end ofthe releasing levervis pivoted on apin 49 carried by a bearing 50 on the lower end of a stem 51, yieldingly supported by a bracket adjustably secured to the upright 2 by a bolt 53. The bracket 5'.) is provided with a bearing cup 54 having a washer ring 55 in its bottom upon which rests a coil. spring 56 located around stem 51, which extends upward freelythrough an aperture 57 .in the bottom of the cup. and has a stop head 58 on its upper end resting on the spring and adjusted by a nut 59. The bottom of the stop head is spherically convexed for bearing on a correspondingly concaved seat 6() formed in the rim of. the bearin(r cup.

'y these means. the pivotal bearing 50 for the outer end ofthe roll release lever 46 is yieldingly supported by the spring in the bearing cup, until the load upon the bearing carries the stop head downward to its seat on the cup; and upon a withdrawal of the load, the spring re-acts to raise the bearing 50 into normal yielding position. The abut'- ment of the upper end 61 of the bearing 50 against the bottom of the bearing cup, serves to stop a further upward movement of the pivotal bearing.

The yielding pivotal bearing thus provided for the roll releasing lever 46. absorbs and relieves the first shock when the hammer head pin 48 impinges the lever. and the friction rod is lifted to release the rolls from the friction board. After the hammer head comes to rest in upper position, the spring re-acts to lift the friction bar up on to its seat before the board beginsto drop; thereby reduc-ing the degree of the frictional adjustment of the roll which would otherwise be necessary, to accommodate the excessive shocks of the hammer caused by varying kinds of work.

The sliding bearing of the runner 43 against the abutment block 44 when the hammer head pin 48 impinges the releasing lever 46, prevents any turning of the lever bracket 4l upon the friction bar 38'; the slight swinging of the bar to and from the step 40 being accommodated bythe movement of the stem 51 in the slotted aperture 57 in the bottom of the bearing cup, and the swinging of the same on the universal joint formed by the head 58 and a spherical seat 60.

The improved'knock-off lever mechanism includes a bracket 62 adjustably secured to the upright 2 by bolts 63, a transverse rock lever 64 carried'by a. pivot bolt 65 in the for- Ward end of the bracket having the knock-off lever 66, pivoted on the inner end, and a spring bolt 67 piyoted on the outer end with a link 68 connecting the lever with an intermediate portion of the bracket.

The knock-ofil lever 66 is pivoted on a bushing 69 through Which the friction bar 38 freely passes for sliding upward and downward, and for such turning as may be required in its movements; and when the hammer drops and impinges the knock-off lever. the same moves bodily forward. by swinging on the pivotal link and arm. and pushes the friction rod forward off the step 40, and the rod then drops down upon the lower ste 40' by sliding 'through the pivotal bushlng and without any turning of the rod.

I claim:

1. A drop hammer frame including a base and an upright. a bearing on the base having a wedge shoulder intermediate its sides` a corresponding bearing and an opposing shoulder on tbe-foot of the upright. and a wedge co-operating with the shoulders for adjusting the upright.

2. A drop hammer frame including a base and an upright, a bearing on the basehaving a wedge shoulder intermediate its sides, a corresponding bearing and an opposing shoulder on the foot of the upright` and a wedge co-operating with the shoulders for adjusting the upright, there being .guide channels in one bearing and guide tongues in the other bearing extending both ways from the wedge shoulders.

3. A drop hammer frame including a base and an upright, a bearing on the base having lateral portions in different planes and an intervening wedge shoulder. a `corresponding bearing and opposing shoulders on the foot of the upright. and a wedge co-operat'- ing with the shoulder for adjusting the upright. l

4. A drop hammer frame'including a base and an upright, a bearing on the base having lateral portions in different planes and an intervening wedge shoulder, a corresponding bearing 'and opposing shoulders on 'the foot of the upright. and a wedge co-operating with the shoulder fory adjusting the upright, there beingguide channels in one bearing and guide tonguesin the other e.\' tending both ways from the wedge shoulders.

5. A drop hammer frame includinga base with uprights thereonand a housing on the uprights, at leastV one of the uprights being laterally adjustable on the base, and means for. adjusting the upper end of the same 1ip right including bearings on the uprightsfor the sides of the housing, hubs on the housing depending inside the uprights, a transverse.

clampingbolt extending through the uprights and the hubs, and adjusting means between one hub and the adjacent upright.

6. A friction roll releasing mechanism for the friction rod of a board drop hammer. including a bracket on the friction rod and a bracket on the hammer frame, a releasing lever' havi i pivotal bearing lin each bracket, one o1 nearings having yielding supports, and means on the hammer for actuating the lever.

7. A friction roll releasing mechanism for the friction rod of a board drop hammer, in-

the lever, a slide runner on the .rod bracket, and an abutment block on the frame to stop a turning of the rod bracket.

` 9. Kick off mechanism for the friction rod of a board drop hammer including a bracket on the hammer frame, a rock arm and a link pivoted on the bracket, a kick 01T arm pivotally connected to the rock arm and the link, the former connection including a bushing freely surrounding the frictionbar,

and means on the hammer for actuating the kick off lever.

HOWARD TERHUNE. 

